Compound wall structure



L. L. KNOX COMPOUND WALL STRUCTURE Nov. 23 1,2926.

Filed J a.n.' 16 1925 Why Y The walls may be and Patented ov. 23, 1926.

UNITED STATES "PATENT oFFlcE.

LUTHER L. KNOX, OF IBEILLEVUE;` PENNSYLVANIA, ASSIGNOR TO KNOX PROLUCTS COM- PANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

COMPOUND WALL STRUCTURE.

Application filed January. 16, 1925. Serial `2,872.

'-Figure 1 is a detail sectional view illustrating a yCorner portion of a structure having walls in accordance with the present 1nvention and Figure 2 is a similar view showing one manner of attaching a partition in position.

My inventionv relates to compound wall structures, particularly those used for insulation, as for example, in iceboxes, refrigerators, etc., 'this application being a division inpartl and continuation in part of my copending application lSerial No. 710,- 357, iled May l, 1924:.A

The object of the` invention is to provide a new and improved structure for such purposes and also al refrigerator or icebox formed therefrom. 4

One of the main features of my invention lies in placing an insulating plug or slab between walls, and then substantially filling` the voids between the Vblock vand at least one of the walls, and preferably between the block and both walls, by pouring or filling lin liquid material which will become solid or semi-solid afterthe filling in operation. Tle insulatincr block or slab is preferably held apartffromone Ior both walls of the 'compound structure by: spacers to provide for entrance of Ithe filled-in 'materiah In this manner, air circulationisavoided andthe insulating efficiency of the wall is greatly increased.` l l.

preferably are of `sheet 'metal and sections may be formed by .means of which, witlrproper corner pieces,

partitions, ete., refrigerating Ystructures ofany desirable size and shape may be built up.l

@In Figures 1, 2, 2 represent the end'p'ortions ofopposed sheet metal walls havingv Itheir edge portions reversely bent, as shown at ,3, y3. 4 indicates the insulating slabs or blocks which may be offzorkb'oard or similar material. In the form shown in this figure, the'cork -filling of this sectiony extends beyond' the walls. to abut against' the similar fillingpf the next section, in this case, a corner section, and the sections when completed, are

held together by joint strips 5, 5", held in Aplace by screws 6,.pas'singy throughthe reversely bentv portions oft-the walls andjinto the insulating filler.. i A'7 indicates thepouredin filler material occupying-fthespaces 'be-V tweenithe insulating slab and themas.

yat the corner sol asto be drawn closely against theother corner slab, this preferably being the case at each joint whether in the corner or side.` The .corner pieces lare held together by .angular inner and outer cover strips 10. f

The filling material is of such nature that it is adapted for insertion into the desired voids in a substantially liquid state, the` filling ofthe voids preferably beingjaccomplished by pouring or flowing the material into place. lThe method of filling the voids is disclosed and claimed in my copending application Serial No. 109,182 filed May 14, 1926,and also in my copending application l Serial No.\710,357 beforereferred to.-

In Figure 1, I show at C an edge portion of a door in which the wall 2 is bent down at the edge to join the outer wall 2", which is seamedS about a flange of the wall 2a. In this case, a space is preferably provided be-` tween the end edge of the asbestos slab 'and theedg of the'door, to receive the filling.

The edge of\this section C' and the corresponding edge of section D are preferably f'oppositely inclined, and gaskets 27 may be' provided s to closed. n l In Figure 2, I show the' edge portion of a partition E, held-by L-shaped strips 28.

properly seal 4the door when In order that the main wall portion may` properly hold the screws for these strips,`

I'preferably insert an inner strip 29 be-I tween thel wall and'the inner core filler in v order to receive the threads' of the securing screws 6, therebeing no reverse bendin of the. metal at this lpoint to--receive t ese screws. The ,screws which I prefer to use need Ato passl through twoseparated portions properly engage the of sheet 'meta-1 vto threads.

' In therefri erator as shown, the top, bot!y l tom, sides an partitions are formed of the sections, such asabove described. p

Where an artificial or natural asphaltor similar material ifs used as a filling, it-refly mains in a semi-solid condition, which is v -also desirable and `imparts sound-deadening qualities. lie advantages of my invention will be' obvious to those Askilled in the art. A simple, inexpensive and effective structure is provided in which air circulation is practica'll eliminated byreason of the pouredin ii ler. In the preferred form shown, structures of different sizes, shapes and kinds may be built from substantially stand ard sections combined with corner sections, door sections, partitions, etc. The sections may be easily, quickly and firmly united by the cover strips, corner stri s, etc., and a very simple, durable and e obtained. j l

While the structure is particularly adapted for cold storage rooms, refrigerators, iceboxes, etc., it may be used for any purpose where insulation is desirable. The inner and outer walls may be of any material, the insulating filling may be of different mateials, the manner of pouring in the filling may be changed, and many other changes may be made Without departing from my invention.

1I claim:

,1, In a compound wall structure, a pair of metal walls, an insulating slab intermediate said walls, said Walls having reversely bent edge portions entirely outside of the plane o the sides of said slab, and filling material between the slab and said walls, substantially as described. k

2.A Ina compound wall structure, a pair of metal walls, an insulating slab intermediate said wa'lls, said Walls having reversely` bent .edge portions entirely. outside of the plane o the sides of said slab, and fillin material between the slab and said Walls, said filling materialhaving a thickness substantially equal to the overall height of said reversely bent edge portions and being inter'- locked therein, substantially as described. 3. A compound Wall structure, comprising an inner wall, an outer wa-ll, an interposed insulating layer adjacent to but spaced from at least .one of said walls and providing space for a filling and a lling in said space,

said filling being of a material adapted for insertion therein in state. v j

A compound wall structure comprising aninner wall, an outer wall, an interposed a substantially liquid insulating slab of corklike material *adjacent ective structure to at least one said vvWalls but providing space for ai filling,V and a filling in said -space, said filling being of a lmaterial adapted for insertion therein in a substantially liquid state. I f

5. A compound Wall structure comprising an inner lWall, an outer wall, au interposed insulating layer adjacent to latleastone of said walls and providing space for a filling -and a' filling in said space having adhesive Vpropert-ies and serving to unite the insulating layer and the adjacent Wall, sald fillmg 'jacent to sa'id Wall and providing space for a filling, and a filling 1n said space, said filling being of a material adapted for insertion therein in a substantially liquid state.

8. A compound Wall structure, comprising. a protective Wall having a` revcrsely bent edge portion, an insulating layer, adjacent to said Wa'll, and providing space for a filling, a filling in said space, said filling beingof a material adapted for lnsertion therein in a substantially liquid state, Vand fastening means extending through the reverselybent edge portion of said Wall:

9. A compound Wall structure compr1s1ng sections, each sect-ion having a protective Wall formedwith a reversely bent edge portion, 'a'n insulating layer of lgreater' width than said protective Wall and spaced from said Wall to provide a space for filling, a filling in said space, said filling being of' a material adapted for insertion therein in a substantially liquid state, fastening means comprising joint strips extending between and overlapping the protective wallet adjacent sections and spanningvthe .joint between t-he insulating layer, said joint strips set my hand. A

LUTHER L. KNOX.

being held in position by driven fastening 

